1997/09/15 Caterpillar


Hose Assembly And New Hardware Replaces Tube Assembly, Improving Fuel Priming Pump Life {1274}

Usage:


D5H (1YD, 2SD, 3MD, 4KD) Track-Type Tractors;
D5H TSK (7EG) Track Skidders

Description of Change: A hose assembly and clipping hardware replaces the tube assembly within the fuel filter and lines group in the above machines powered by 3304 Engines. The hose assembly decreases fuel injection pressure pulses (reflection) at the fuel priming pump. The hose assembly increases fuel priming pump life by reducing the possibility of failed check valves within the priming pump body. Failed check valves can cause poor fuel priming pump performance and fuel leakage.

Adaptable To: The 103-1047 Hose Assembly replaces the former 4P-7050 Tube Assembly in the above machines. The 103-1047 Hose Assembly is a component of the 7E-8713 Fuel Filter And Lines Group. The 4B-9302 Clip, 4B-0418 Clip, and 0S-0509 Bolt are used as hardware for installation of the 103-1047 Hose Assembly. The 103-1047 Hose Assembly is adaptable back to first production.

NOTE: The 103-1047 Hose Assembly is adaptable as a service replacement to the earlier 9Y-3072 Tube Assembly within the 9Y-3926 Filter Group.

NOTE: The 103-1047 Hose Assembly is not effective with D5H (7NC, 8RC, 8SC, 9HC, 1DD), and D5H XL (8RJ) Track-Type Tractors. The 103-1047 Hose Assembly is available as a service replacement.

NOTE: Effective serial numbers for machines built in Japan are not available at this time.

Caterpillar Information System:

1997/09/15 Transmission Shift Control Group Improved For Reliability And Longer Service Life {3168}
1997/09/15 Heavy Duty Debris Guards Available {4150,4187,4177}
1997/09/15 Service Magazine Special Edition, SEPD0376, Available {0374}
1997/09/08 3406C Pump And Governor Changes Provide Improved Oil And Fuel Leak Resistence{7555}
1997/09/08 New Engine Starting Motor Available{1453}
1997/09/08 New Steel Bearings Available For Front Cylinder Mounts{7551,7201}
1997/09/08 New Handrails Improves Service Life{7256}
1997/09/08 New Thrust Washer In Final Drive And Wheel Group Improves Service Life{4051}
1997/09/08 Wiring Harness Update{1408}
1997/09/01 Improvement Provides Better Sealing For Unit Injectors {1290}
1997/09/01 Revised Operation And Maintenance Manual Now Available {0374,0375}
1997/09/01 Service Manual And Parts Manual Literature Now Available {0374,0375,7568}
1997/09/15 New Seal Used In Transmission Transfer Gear Group For Improved Seal Life {3159,3002}
1997/09/15 New Hoist Cylinder Seals And End Cap Now Available For Service Repair {5102}
1997/09/15 New Rear Suspension Cylinders Improve Service Life {7213,7201}
1997/09/15 Proper TH Series Transmission Clutch And Solenoid Operation {3150,3073,3155,3167}
1997/09/15 New Rear Axle Differential Group Bevel Gear Set Improves Service Life {3258,3013,3256,3278}
1997/09/15 New Front Axle Bevel Gear Set Improves Service Life {3258,3013,3256,3278}
1997/09/15 Correction To Fan Speed And Pressure Test Procedure {1356,1386,1387}
1997/09/15 New Temperature Regulators Provide More Accurate Opening And Closing Temperatures {1330,1355}
1997/09/15 Cold Cylinder Cutout Strategy Added To The Electronic Control Module (ECM) Software {1902}
1997/09/22 Non-Rotating Drawbar Pin Extends Service Life{7105,7119}
1997/09/22 Charcoal Air Filter Available Reduces Odors From Outside Air{7309,7320,7342}
1997/09/22 Engine Oil Filter Access Changed For Improved Serviceability And Turbo Life{1306}
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